Cannot assign to read only property '$methodName' of false Use --force to continue.

[TheBranchDriftCatalyst]

I ran into this problem today and after a bit researched have discovered the problem might lie in, ng-annotate-main.js

Here is the original issue: https://github.com/olov/ng-annotate/issues/126

After the addition of the guard statement as described this works (-ish), I have not run the test suite but grunt build works again.